M7350/kernel/drivers/iommu/Kconfig

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# IOMMU_API always gets selected by whoever wants it.
config IOMMU_API
bool
menuconfig IOMMU_SUPPORT
bool "IOMMU Hardware Support"
default y
---help---
Say Y here if you want to compile device drivers for IO Memory
Management Units into the kernel. These devices usually allow to
remap DMA requests and/or remap interrupts from other devices on the
system.
if IOMMU_SUPPORT
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menu "Generic IOMMU Pagetable Support"
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# Selected by the actual pagetable implementations
config IOMMU_IO_PGTABLE
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bool
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config IOMMU_IO_PGTABLE_LPAE
bool "ARMv7/v8 Long Descriptor Format"
select IOMMU_IO_PGTABLE
help
Enable support for the ARM long descriptor pagetable format.
This allocator supports 4K/2M/1G, 16K/32M and 64K/512M page
sizes at both stage-1 and stage-2, as well as address spaces
up to 48-bits in size.
config IOMMU_IO_PGTABLE_LPAE_SELFTEST
bool "LPAE selftests"
depends on IOMMU_IO_PGTABLE_LPAE
help
Enable self-tests for LPAE page table allocator. This performs
a series of page-table consistency checks during boot.
If unsure, say N here.
endmenu
config OF_IOMMU
def_bool y
depends on OF
config FSL_PAMU
bool "Freescale IOMMU support"
depends on PPC_E500MC
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select IOMMU_API
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select GENERIC_ALLOCATOR
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help
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Freescale PAMU support. PAMU is the IOMMU present on Freescale QorIQ platforms.
PAMU can authorize memory access, remap the memory address, and remap I/O
transaction types.
# MSM IOMMU support
config MSM_IOMMU
bool "MSM IOMMU Support"
select IOMMU_API
select ARM_DMA_USE_IOMMU if ARM
select ARM64_DMA_USE_IOMMU if ARM64
help
Support for the IOMMUs found on certain Qualcomm SOCs.
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These IOMMUs allow virtualization of the address space used by most
cores within the multimedia subsystem.
If unsure, say N here.
# MSM IOMMUv1 support
config MSM_IOMMU_V1
bool "MSM IOMMUv1 Support"
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depends on ARCH_MSM8974 || ARCH_MSM8226 || ARCH_APQ8084 || ARCH_MSM8916 || ARCH_MSM8994 || ARCH_MSM8992 || ARCH_MSM8909
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select IOMMU_API
select MSM_IOMMU
help
Support for the IOMMUs (v1) found on certain Qualcomm SOCs.
These IOMMUs allow virtualization of the address space used by most
cores within the multimedia subsystem.
If unsure, say N here.
config MSM_IOMMU_PMON
bool "MSM IOMMU Perfomance Monitoring Support"
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depends on (ARCH_MSM8974 || ARCH_MSM8610 || ARCH_MSM8226 || ARCH_APQ8084) && MSM_IOMMU
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help
Support for monitoring IOMMUs performance on certain Qualcomm SOCs.
It captures TLB statistics per context bank of the IOMMU as an
indication of its performance metric.
If unsure, say N here.
config IOMMU_PGTABLES_L2
bool "Allow SMMU page tables in the L2 cache (Experimental)"
depends on MSM_IOMMU && MMU && SMP && CPU_DCACHE_DISABLE=n
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help
Improves TLB miss latency at the expense of potential L2 pollution.
However, with large multimedia buffers, the TLB should mostly contain
section mappings and TLB misses should be quite infrequent.
If unsure, say N here.
config IOMMU_LPAE
bool "Enable support for LPAE in IOMMU"
depends on MSM_IOMMU
help
Enables Large Physical Address Extension (LPAE) for IOMMU. This allows
clients of IOMMU to access physical addresses that are greater than
32 bits.
If unsure, say N here.
config IOMMU_AARCH64
bool "Enable support for AARCH64 in IOMMU"
depends on (MSM_IOMMU && (!IOMMU_LPAE))
help
Enables AARCH64 format page tables for IOMMU. This allows clients of
IOMMUs to use Virtual and physical addresses up-to 48 bits. This will
also support the clients who can't generate addresses of more than 32
bits. Presently, this config assumes that if SMMU global space is
programmed by some secure environment, they configure all the CBs of
all the SMMUs as AARCH64 formatted.
If unsure, say N here.
config MSM_IOMMU_VBIF_CHECK
bool "Enable support for VBIF check when IOMMU gets stuck"
depends on MSM_IOMMU
help
Enables an extra check in the IOMMU driver that logs debugging
information when TLB sync or iommu halt issue occurs. This helps
in debugging such issues.
If unsure, say N here.
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config IOMMU_NON_SECURE
bool "Turns on programming of secure SMMU by kernel"
depends on MSM_IOMMU
help
Say Y here if you want the kernel to program all SMMUs regardless of
whether SMMUs are secure or not. A secure SMMU is an SMMU that has
its global address space programmed by the secure environment. In
addition some of the context banks might be owned/programmed by the
secure environment for a secure SMMU. Enabling this feature can be
used during testing when the secure environment is not available
and the kernel needs to program all the SMMUs.
If unsure, say N here.
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config IOMMU_FORCE_4K_MAPPINGS
bool "Turns off mapping optimization and map only 4K pages"
depends on MSM_IOMMU
help
Say Y here if you want the IOMMU driver to map buffers with
4KB mapping only. With this, we don't get performance gains
by optimizing mapping. This is a debug feature and should be
used only when we want to profile the performance in the
worst case scenario.
If unsure, say N here.
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# AMD IOMMU support
config AMD_IOMMU
bool "AMD IOMMU support"
select SWIOTLB
select PCI_MSI
select PCI_ATS
select PCI_PRI
select PCI_PASID
select IOMMU_API
depends on X86_64 && PCI && ACPI
---help---
With this option you can enable support for AMD IOMMU hardware in
your system. An IOMMU is a hardware component which provides
remapping of DMA memory accesses from devices. With an AMD IOMMU you
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can isolate the DMA memory of different devices and protect the
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system from misbehaving device drivers or hardware.
You can find out if your system has an AMD IOMMU if you look into
your BIOS for an option to enable it or if you have an IVRS ACPI
table.
config AMD_IOMMU_STATS
bool "Export AMD IOMMU statistics to debugfs"
depends on AMD_IOMMU
select DEBUG_FS
---help---
This option enables code in the AMD IOMMU driver to collect various
statistics about whats happening in the driver and exports that
information to userspace via debugfs.
If unsure, say N.
config AMD_IOMMU_V2
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tristate "AMD IOMMU Version 2 driver"
depends on AMD_IOMMU
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select MMU_NOTIFIER
---help---
This option enables support for the AMD IOMMUv2 features of the IOMMU
hardware. Select this option if you want to use devices that support
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the PCI PRI and PASID interface.
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# Intel IOMMU support
config DMAR_TABLE
bool
config INTEL_IOMMU
bool "Support for Intel IOMMU using DMA Remapping Devices"
depends on PCI_MSI && ACPI && (X86 || IA64_GENERIC)
select IOMMU_API
select DMAR_TABLE
help
DMA remapping (DMAR) devices support enables independent address
translations for Direct Memory Access (DMA) from devices.
These DMA remapping devices are reported via ACPI tables
and include PCI device scope covered by these DMA
remapping devices.
config INTEL_IOMMU_DEFAULT_ON
def_bool y
prompt "Enable Intel DMA Remapping Devices by default"
depends on INTEL_IOMMU
help
Selecting this option will enable a DMAR device at boot time if
one is found. If this option is not selected, DMAR support can
be enabled by passing intel_iommu=on to the kernel.
config INTEL_IOMMU_BROKEN_GFX_WA
bool "Workaround broken graphics drivers (going away soon)"
depends on INTEL_IOMMU && BROKEN && X86
---help---
Current Graphics drivers tend to use physical address
for DMA and avoid using DMA APIs. Setting this config
option permits the IOMMU driver to set a unity map for
all the OS-visible memory. Hence the driver can continue
to use physical addresses for DMA, at least until this
option is removed in the 2.6.32 kernel.
config INTEL_IOMMU_FLOPPY_WA
def_bool y
depends on INTEL_IOMMU && X86
---help---
Floppy disk drivers are known to bypass DMA API calls
thereby failing to work when IOMMU is enabled. This
workaround will setup a 1:1 mapping for the first
16MiB to make floppy (an ISA device) work.
config IRQ_REMAP
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bool "Support for Interrupt Remapping"
depends on X86_64 && X86_IO_APIC && PCI_MSI && ACPI
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select DMAR_TABLE
---help---
Supports Interrupt remapping for IO-APIC and MSI devices.
To use x2apic mode in the CPU's which support x2APIC enhancements or
to support platforms with CPU's having > 8 bit APIC ID, say Y.
# OMAP IOMMU support
config OMAP_IOMMU
bool "OMAP IOMMU Support"
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depends on ARCH_OMAP2PLUS
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select IOMMU_API
config OMAP_IOMMU_DEBUG
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tristate "Export OMAP IOMMU internals in DebugFS"
depends on OMAP_IOMMU && DEBUG_FS
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help
Select this to see extensive information about
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the internal state of OMAP IOMMU in debugfs.
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Say N unless you know you need this.
config TEGRA_IOMMU_GART
bool "Tegra GART IOMMU Support"
depends on ARCH_TEGRA_2x_SOC
select IOMMU_API
help
Enables support for remapping discontiguous physical memory
shared with the operating system into contiguous I/O virtual
space through the GART (Graphics Address Relocation Table)
hardware included on Tegra SoCs.
config TEGRA_IOMMU_SMMU
bool "Tegra SMMU IOMMU Support"
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depends on ARCH_TEGRA && TEGRA_AHB
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select IOMMU_API
help
Enables support for remapping discontiguous physical memory
shared with the operating system into contiguous I/O virtual
space through the SMMU (System Memory Management Unit)
hardware included on Tegra SoCs.
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config EXYNOS_IOMMU
bool "Exynos IOMMU Support"
depends on ARCH_EXYNOS
select IOMMU_API
select ARM_DMA_USE_IOMMU
help
Support for the IOMMU (System MMU) of Samsung Exynos application
processor family. This enables H/W multimedia accelerators to see
non-linear physical memory chunks as linear memory in their
address space.
If unsure, say N here.
config EXYNOS_IOMMU_DEBUG
bool "Debugging log for Exynos IOMMU"
depends on EXYNOS_IOMMU
help
Select this to see the detailed log message that shows what
happens in the IOMMU driver.
Say N unless you need kernel log message for IOMMU debugging.
config SHMOBILE_IPMMU
bool
config SHMOBILE_IPMMU_TLB
bool
config SHMOBILE_IOMMU
bool "IOMMU for Renesas IPMMU/IPMMUI"
default n
depends on ARM
depends on ARCH_SHMOBILE || COMPILE_TEST
select IOMMU_API
select ARM_DMA_USE_IOMMU
select SHMOBILE_IPMMU
select SHMOBILE_IPMMU_TLB
help
Support for Renesas IPMMU/IPMMUI. This option enables
remapping of DMA memory accesses from all of the IP blocks
on the ICB.
Warning: Drivers (including userspace drivers of UIO
devices) of the IP blocks on the ICB *must* use addresses
allocated from the IPMMU (iova) for DMA with this option
enabled.
If unsure, say N.
choice
prompt "IPMMU/IPMMUI address space size"
default SHMOBILE_IOMMU_ADDRSIZE_2048MB
depends on SHMOBILE_IOMMU
help
This option sets IPMMU/IPMMUI address space size by
adjusting the 1st level page table size. The page table size
is calculated as follows:
page table size = number of page table entries * 4 bytes
number of page table entries = address space size / 1 MiB
For example, when the address space size is 2048 MiB, the
1st level page table size is 8192 bytes.
config SHMOBILE_IOMMU_ADDRSIZE_2048MB
bool "2 GiB"
config SHMOBILE_IOMMU_ADDRSIZE_1024MB
bool "1 GiB"
config SHMOBILE_IOMMU_ADDRSIZE_512MB
bool "512 MiB"
config SHMOBILE_IOMMU_ADDRSIZE_256MB
bool "256 MiB"
config SHMOBILE_IOMMU_ADDRSIZE_128MB
bool "128 MiB"
config SHMOBILE_IOMMU_ADDRSIZE_64MB
bool "64 MiB"
config SHMOBILE_IOMMU_ADDRSIZE_32MB
bool "32 MiB"
endchoice
config SHMOBILE_IOMMU_L1SIZE
int
default 8192 if SHMOBILE_IOMMU_ADDRSIZE_2048MB
default 4096 if SHMOBILE_IOMMU_ADDRSIZE_1024MB
default 2048 if SHMOBILE_IOMMU_ADDRSIZE_512MB
default 1024 if SHMOBILE_IOMMU_ADDRSIZE_256MB
default 512 if SHMOBILE_IOMMU_ADDRSIZE_128MB
default 256 if SHMOBILE_IOMMU_ADDRSIZE_64MB
default 128 if SHMOBILE_IOMMU_ADDRSIZE_32MB
config IPMMU_VMSA
bool "Renesas VMSA-compatible IPMMU"
depends on ARM_LPAE
depends on ARCH_SHMOBILE || COMPILE_TEST
select IOMMU_API
select ARM_DMA_USE_IOMMU
help
Support for the Renesas VMSA-compatible IPMMU Renesas found in the
R-Mobile APE6 and R-Car H2/M2 SoCs.
If unsure, say N.
config SPAPR_TCE_IOMMU
bool "sPAPR TCE IOMMU Support"
depends on PPC_POWERNV || PPC_PSERIES
select IOMMU_API
help
Enables bits of IOMMU API required by VFIO. The iommu_ops
is not implemented as it is not necessary for VFIO.
config ARM_SMMU
bool "ARM Ltd. System MMU (SMMU) Support"
depends on ARM64 || ARM
select IOMMU_API
select IOMMU_IO_PGTABLE_LPAE
select ARM_DMA_USE_IOMMU if ARM
select ARM64_DMA_USE_IOMMU if ARM64
help
Support for implementations of the ARM System MMU architecture
versions 1 and 2.
Say Y here if your SoC includes an IOMMU device implementing
the ARM SMMU architecture.
menuconfig IOMMU_DEBUG
bool "IOMMU Profiling and Debugging"
help
Makes available some additional IOMMU profiling and debugging
options.
if IOMMU_DEBUG
config IOMMU_DEBUG_TRACKING
bool "Track key IOMMU events"
select IOMMU_API
help
Enables additional debug tracking in the IOMMU framework code.
Tracking information and tests can be accessed through various
debugfs files.
Say Y here if you need to debug IOMMU issues and are okay with
the performance penalty of the tracking.
config IOMMU_TESTS
bool "Interactive IOMMU performance/functional tests"
select IOMMU_API
help
Enables a suite of IOMMU unit tests. The tests are runnable
through debugfs. Unlike the IOMMU_DEBUG_TRACKING option, the
impact of enabling this option to overal system performance
should be minimal.
endif # IOMMU_DEBUG
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endif # IOMMU_SUPPORT